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HP Pavilion 3100 and 3200 Series Desktop PCs - Motherboard Jumper Settings (Pentium 1)

This document provides technical information about using the jumper blocks on the motherboard.
 note:
This document contains procedures that are technical. The person performing the procedure should have extensive computer experience working both with hardware and software.
Jumper and switch functions for HP Pavilion 3100 series PCs
Figure : Motherboard layout for the 3100 series
3100 Series Motherboard Layout Legend
A Socket 7 Pentium Processor
B 82438VXsocket
C 82437VX
D DIMM sockets
E PCI/ISA Expansion Connector
F 82371SB PCI ISA/IDE Accelerator (PIX3)
G S3 TRIO 64V+ Graphics
H Video memory controller
I VGA Feature Connector
J Primary IDE connector
K Secondary IDE connector
L Floppy Drive connector
M Battery
N VGA Monitor connector
O Universal Serial Bus connectors
P Microphone connector
Q Speaker connector
R Super I/O, RTC and Keyboard controller
S Mouse connector
T Keyboard connector
U Parallel port connector
V Serial port connector (COM1)
W Power Supply connectors
JCF1/JCF2: Host clock selector
Host Clock
JCF1
JCF2
50
2 - 3
2 - 3
55
1 - 2
2 - 3
60
2 - 3
1 - 2
66 (default)
1 - 2
1 - 2
JBF0/JBF1: CPU speed multiplier selector
CPU Multiplier
JBF0
JBF1
x 1.5
1 - 2
1 - 2
x 2.0
2 - 3
1 - 2
x 2.5 (default)
2 - 3
2 - 3
x 3.0
1 - 2
2 - 3
JA2V: P55C CPU voltage selector
P55C Voltage
JA2V
2.84V (default)
2 - 3
JA3V: CPU voltage selector
CPU Voltage
JA3V
3.38V (default)
1 - 2
3.54V
2 - 3
JPWRS: P54C or P55C CPU type selector
CPU Type
JPWRS 1 , 2
P54C
1 - 3 , 2 - 4
P55C (default)
3 - 5 , 4 - 6
JBAT: RTC battery enable/disable
RTC Battery
JBAT
Enable (default)
1 - 2
Disable
2 - 3
JUSBCLK: USB clock selector
USB Clock
JUSBCLK
24 MHz
1 - 2
48 MHz (default)
2 - 3
JWRT: Sound chip EPROM, 24C16, programming control
24C16
JWRT
On (default)
Programming 24C16 in manufacturing process
Off
Write protect after manufacturing process
Jumper and switch functions for HP Pavilion 3200 series PCs
Figure : Motherboard layout for the 3200 series
A Socket 7 Pentium Processor
B 430 TXR Chipset socket
C DIMM sockets
D PCI/ISA Expansion Connector
E Primary IDE connector
F Secondary IDE connector
G Floppy Drive connector
H Front Panel connectors
I Battery
J ATI VT2 2W 3D Graphics Controller
K VGA Feature Connector
L Upgrade Video Memory
M 1 Mbyte Video memory
N BIOS Flash ROM
O 16 bit industry standard audio
P VGA Monitor connector
Q Universal Serial Bus connectors
R CD-ROM Audio connector
S Speaker connector
T Microphone connector
U Mouse connector
V Keyboard connector
W Game port connector
X Parallel port connector
Y System fan connector
Z Serial port connector (COM1)
AA Processor fan connector
BB Power Supply connectors
JBF0/JBF1/JBF2: CPU speed selector
CPU Multiplier
JBF0
JBF1
JBF0
Pentium (R) 200 MHz with MMX
1 - 2
2 - 3
1 - 2
Pentium 233 MHz with MMX
1 - 2
1 - 2
1 - 2

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